Machine for sharpening safety-razor blades.



A. L. HATFlELD. MACHINE POR SHARPENING SFETY RAZOR BLADES.

APPLICATION FILED NOV. 13. 1911.

Patented 5311.5, 191.5.

4 SHEETS-SHEET 1.

W 4. M QN m @Y AHORA/EY.

A. L. HATPIELD. MACHINE FOR SHARPENING SAFETY RAZOR BLADES.

APPLIUATION FILED Nov.13. 1911.

Patente Jan. 5, 1915,

4 SHEBTS-SHEET 2.

LL. HATFELD= MACHINE POR SHARPEN'ING SAFETY RAZOBfLA-Ds,

APPLICATION FILED IFOV. 13, 1911. L y' atnted Jan. 5y 11915.

' 4 SHEETS-SEEE 2.

WIT/11158858 )5 v ,wwf/vm@ f WM f wwgyf A MQW MM A. L. HATFIEL-D. MAGEINE EOE SHAEPENING SAFETY EA'ZOP. BLADES.

APPLICATION .FILED NOV. 13, 191i.

Patentd J an. 5

4 SHEETS-SHBEV'Ll 4.

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- ot one of t" i *iol 'f zoll .litio .lilDE/El HAT'FELD, F NEVJABK, NEW

Specification of Letters Patent.

Patented Jan. 5.. loro.

Application filed November 13, 1911. Serial No. 659,884.

,To all 'whom it may Conce/ru y Be it known that l, Annunw L. HATFIELD, a citizen of the United States, residing at ewark, Essex county, ll'cw lJersey, have in# *ited certain new and useful Improve- :nts in Machines 'for Sharpening Safetyl'l-aaor Blades, tc.; of which the following a. speciiication.

rl"he objects oit the invention arev to provide novel and highly etlicient machine for -iening thin blades oi. that general charamer which are commonly employed in con- :Jion with safety razors, the said machine ig automatic in its4 action and. being pted to be driven by power; to provide novel means for manipulating the blades d grinding elements so as to quickly and uniformly sharpen the blade; to give the grinding elements longitudinal movement as well as rotary and thus cause theni to weer evenly; to provide a construction which .'adlnits of the blades being quickly placed in operative position or removed therefrom; to enable either a single blade or a plurality of blades to be removed or inserted. at once; to conveniently and thoroughly magnet-ine the blades as they are sharpened, and. to obtain other advantages and results as may be brought out in the tollowing description.

lieferung to the accompanying drawings,

in which like numerals of reference indicatetudinal sectional view through the upper set,

of grinding rolls; Fig. 5 is a top plan view the blade holders and aportion ot for supporting the blade holders;

the plate an enlarged top plan view ot one Fig. tl is of the blade holders detached; Fig. 7 is a side elevation of one of the blade holders, one end thereof being removed; Fig. 8 is an enlarged transverse sectional view through one of the blade holders on the line B-B of Fig. 7 Fig. 9 is an enlarged detail View of one of the 'fastening pins for retaining the blade holders in position; Fig. l() is an enlarged 'sectional view on the line C--C ot Fig. 5, the blade holder being removed; Fig. 1.1. is a front view of theportion ot the blade carrying plate shown by Fig. Fig. 12 is a transverse sectionall view through the rocking carriers and the connecting members between the same, the said section beine' taken on the line DWD ot Fig. l; Fig. lll is an enlarged detail view of the cani nicchanism for rocking the carriers; the said section being taken on the line lil-l of Fig. l, and llig. lelis a detail. view ot the link between the bell crank lever andthe arin ot the carrier.

Specifically describing the present e1nbodiinent of the invention; the nuljnerals 1 designate a pair ot spaced standards which constitute the supporting traine upon which the grinding and sharpening mechanism is mounted. The lower ends of the standardsA 1 are provided with the feet which may be secured to any suitable base, while theuupper ends of the .standards are connected bv 'in a cross bar 3. n upper set of rolls t and 5; and also a lower set of rolls G and T are mounted between the standards 1, the rolls of each set having a'spaced and parallel relation and revolving in opposite directions. Each of the rolls is formed with trunuious 8, the various trunnions passing loosely through bearing sleeves 9 in the standards 1 and the length oithe rolls being slightly less than the distance between the standards so that the rolls can have a longitudinal as well as a rotary movement. This longltudinal movement is in rnany cases very important; since it prevents 'nicks or the like in the blades from wearing annular ridges in the rolls 'so as to decrease the e'l'liciency thereof. The top roll el of the upper pair of rolls is provided upon'one side of the machine with a pulley 10 which is connected by a belt 1l to a similar pulley 1'?. rigid with the top roll (5 o'f the lower set of rolls. rl`he roll G is also provided with a second pulley "il engaging a belt 14 which also passes around a pulley 15 upon a drive shaft 1G which may receive power from any suitable source, and is preferably located under the grinding and sharpening device,'as indicated by llig. 2. 0n the opposite side ot the machine; the lower roll 5 of the upper set of rolls is provided with a pulley 17 which is connected by a belt.l8 to a similar pulley 1.9 upon the lower roll 7 of the lower set of rolls. rlChis lower roll 7 is also provided with a pulley 2() which is connected by a` belt 21 to a pulley upon the drive shaft 16, the said belt 21 als@ ipa being crossed, as indicated by Fig. 2, so that the upper roll and lower roll ot' each set will revolve in opposite directions.

A cam shaft z2 is journaled upon the standards l near the lower ends thereof, the said cani shaft receiving power in some suitable n'ianner as means of the belt and pulley connection 23 with a countershafi'; l-l. which is shown as having a belt and pulley connection with the main drive shaft 16. The cam shaft 22' projects beyond one end of the machine where it is provided with a. disk 2U having a cam groove Q7 therein. rihis cam shaft is also provided with a disk QS having a, cam groove therein, the said cam groove including oii'sot straight portions 2S) 'which are connected at diai'netrically opposite'points by sharply inclined port-ions 30. A member operatinr'j;` witain the groove Vwill thus be quickly shifted bachi and ortlrbetween the straight portions z) olf the groove as the cam shalt is rotated. A roll shifting lever 3l is piv ted at an interme-.diatel point in its. length as indicated at upon breitet 33 projecting from one of the stai'idards l. The lower end of this lever ir provided with a projection 3l which received within the cam groove 27 of the disk 2G, while the upperl end of the lever is notched at 3e and loosely receives a.

pin 3U upon a bar 37 connecting the trunnions of the various rolls. rThis bar is provided with bearing sleeves "n the trunnions and are iitted between collars 3L thereon so that the rolls will he moved longitudinally as the bar is forced. toward and away i'rom the standard l. As the cam shailt 22 is rotated the lever 3l is reip'rocated baci: and forth so as to move the various rolls l`ngitudi1ially and cause them to operate unifoinily upon the razor blades. As above mentioned this longitudinal movement of the rolls also has the ad k preventing any niclfs in the blades from wearing grooves or ridges upon the rolls and decreasing the eiiicicncy thereof.

A rocking blade carrier i0 is prginidcd for each pair oi the rolls, the said blade carriers being shown in the present instance as provided at opj'iosite ends thereof with pendent ears Llil which are loosely mounted upon transverse rods or shafts i2 connecting the standards. A blade carrying plate 43 is detachably mounted upon each. of the rocking carriers 40, the said plates being shown as provided at opposite ends thereof with slots aL-i receiving screws 45 which project from the carriers and are engaged by clamping nuts 46. These blade carrying plates are each provided at suitable intervals with upwardly projecting lugs or ears 47 which are arranged in pairs and are provided with rearwardly opening bearing notches 48. Each pair of the lugs 47 is designed to receive a blade hold er 49, the

vanta ge or.'

ce which receive i formed witl'i opsaid blade holders being ons .3() which are positely projecting trani; removably received within the bearing n.otciies'sl.) .A spring strip 5i). is arranged under each of the blade holders, the 'intermediate portion oi the spring strip being secured to the plate. i3 in some suitable. manner as by means of a screw 5&5, while the ends oi.' the spring are deflected upwardly so as to engage the blade holder 4f) on opposite sides oi' the pivot point thereof. The forward end oir the springenters a notch 51 in the under side of the holder. sce Fig. 7 moreI j'articularly, and thus releasably retains the holder in place for operation of the rolls ipon the blade carried by it. rl"he ends of the spring are engaged by screws 54- p: seing upwardly through forwvardlj,Iv and rearwardly projecting wings 55 upon tbe plate 43, and by manipulating these screws the tclinifni in the spriixgs can be adjusted as may be desired. rlhe blade holders are thus held yieldingly in position. so that as they are recited bach and forth the blades will be alternatclj.' held yieldingly against the two rolls.

Ii desired, arched pins S6 may be provided for the purpose of retaining` the blade holders in position, the arms ot the arched )ins fitting within openings in the lugs 47 so as to extend across the notches do and retain the trunnions 50 thereiii.

lach blade holder i9 is provided with a` head 5G having jaws 5T which are adapted to grip a thin blade so as to retain the saine securely in position. rihese jaws are shown as connected by the clamping screws 58 which may be loosened for rcanoving a` blade or placing a blade in. position, aud tightcned to grip a. blade preparatory to applying the holder to the machine for the purpose oi" sharpening the blade. It will be observed that the head 56 is formed with a rearwardly projecting axial stem 59 which is loosely received within a correspoiuling socket in the end of the holder 49 and is 'j irovided with` a transverse opening receivine' a pin GO. As. indicated more clearly by 131g. 8, this transverse opening is flared at the opposite ends thereof to admit oi the head having a. slight rotary movement independent oii the blade holder. This enables the blade to readily accommodate itself to the rolls so that the rolls always act upon the blade in a uniform manner.

The upper and lower blade carriers 4() are provided with arms 61 which are connected by a link 62 for causing the two blade carriersto roch together. The lower blade carrier 40, as indicated more clearly in lfig. 13, is provided with a second lateral arm 63 which has an operative connection with one arm olE a` bell crank lever Gil, the opposite arm of the said bell crank .lever being provided with a projection 6 5 which travels in v :Maasai is connected to the arm by a screw "n while the opposite sleeve Si receives a si n; lar stem Z1 projetting1 from hloel it? which is `seeured to the upper oil "l bell crank lever (il by a screw la,

WY ith the above construction il: 'will he' obvious that as the cam shaft is rotated, during the 'operation of the machine the bell crank lever 6l `.vill be moved bach and'iiorth so as to simultaneously roch the ,blade car riers l0. "lhe various blades in the diilerent holders 4:9 are thereby brought 'aecessively into engagement With'the upper and lower rolls, the swivel connection hete" n the heads 5 6 and the holders enabling th blades to adjust themselves toA the rolls, wli'ie 'the springs 52 hold the blades j, eldinfflv f gagement With the rolls. Tvil/"hen ti This linlr, will: he

hiehand siisul ated the'refrom thef opposite y-ends of the .brush r'etionally.engagingill dnotor plates' .the adjaeentends i rolls. At the lother ende-ii thefinoehnef-the plate ol' the upper-roll 's engaged by a brush 82 eonneetedvtoa binding po'stSS, While the. 'plate 79 of the loner,rollo enby' a' brash 84 oonneotedto afbinding post ha. The terminals of angeleetrio `oir- @uit are designed to he securedto itl-ie bind-1 ing posts 83 and 85,:and the-current .will then pass continuously through the magnets as the .rolls rotate so as toHprodueea-inagnetic field around the blades and inagnetize the saine as they are 'sharpened-The brushes would, of course,possess' the necessary resiliency to permit; thevroll's to he shifted longitudinally ias 'hasr heenr Vpreviously mentioned. i L

ln operation, the blades to hefsharpened are ground first anon the` lower set of rolls i. .6, 7, and are linisliedupon the upper set of rolls 4l, B-,Wliieh are ofj the diilei'ent char acter required for honing,^ vorv finishing* rlhis means that each blade 1n its'holder is', in-

.\. tion 65 is' n engagenent *with file or ne sorted 'at the lower-seam? rollsdgand then straight portions 29 theeani @move in remo a and inserted again-idr: the upper the dish 28 the blades' are in ena mehr `set oirollsff By my improve" leonstract'ion,

with one oi" the rolls, while when progeetion is in engagement with the op posite straight portion olf the thehlades are in engagement wi from engagement with one e roll engagement with the opposite roll. accordingly he obvious-that nl des are in eneagement with one or the o or the rolls practically all the time, the shitting; from one roll to the opposite roll being ver?? quickly aoeoinpli,` d.

lt has been found 'that razor blades and the like retain an period of time il? they are niagjnitized Means has accordingly heen. provided'or subiecting the blades to the action of a magnetic held and magnetining the same as are sharpened. have a hollow formation and have oppositely Wound electro magnets 'llland 5 arranged transversely therein, the pole pieces 76 at the ends of the magnets being secured to the metallic shells oir' the rolls in some suitable manner as by means of the screws' 77. Plugs 78 o'l' wood or some similar nia- 4terial are. inserted in the ends of the rolls :tor a much longer lThe upper rolls and i holders -can beluindled at thefsame time. l`h'is is eli/acted by means ofthe plates. 48,

v'upon each of which lhaveshonnfinonntings for sin individual blade holders, although the :number might of course he varied desired. By removing this plate 43 trom, the "lower carrier Il() and placing 'it upon the upper earlier l0, six blades can heliandled at once.` r'," if desired, any individual holderl 'aan .he removed from a' `plate lo upon vthe lower carrier l() `and inserted, upon the plate of the or iercarrier, Greatponyen ienne and facility in the Werl; offgsharpening thus secured, i .1 y, p lt will be noted that the. cams-326. and are so arranged and timedthat'uhile the blades are 'restingupon one roll o i set the .rolls a shifted longitudinally ifo'rtheir entire ,""ange of movement and bac-l: .again to the startingpoint. rlfhe cani QSNandNcOn nections then. tlirouv the-blades" into eonnec tion Ta'ith' .,tlieother rollk ofthe set, and the rol` il' ift again as' hefore Thisfi'slgoontinuedfindenitely. l-laving 'thus described they invention, what l claim is:

1.,'l`he combination with a sharpening element having a sharpening` surface with diametri'cally opposite portions, oi' a magnet having opposite ends or poles adjacent said diametrically opposite portions of the sharpening surface respectively.

2. A blade sharpening machine including a sharpening roll, means for rotating said lli mentv'witlrthe sharpening roll, and almagparts ofthe peripheral surface of the roll. 3'. A blade sharpening machine including fa pair of sharpening rolls, means for ro"L tating said rolls, means for holding a blade' alternatelyv in engagement With the two' rolls, oppositely Wound electromaonet/s arranged one transversely within each roll with its endsor -poles adjacent'separated lparts. of' the peripheral surface of the roll,

and means for conveying current to the two .electroggnagnets as the rolls revolveso as to magnetize thelblades as they are sharpened.

45A blade 'sharpening machine including a pairof sharpening rolls, a rocking'member provided with a 'pair of lugs having bearingvnotches therein, a blade holder having trunnions adapted to be received Within the bearing notches, -a spring strip carried by the-,rocking member and engaging the blade holder to retain. the bklade in a yield# ing engagement with the roll, and means for adjustingfthe-'tension ott the spring.

5. A .blade sharpening machine including a pair of sharpening rolls, a rocking mem- -ber provided with a pair of lugs having bearing notches therein, a blade holder hav'- ing trunnions adapted to be received within the bearing notches, a spring strip carried by the-rocking member and having opposite .ends thereof in engagement With the blade holder, and screws engaging the ends of the' spring strip to regulate the tension therein. i

26. A blade sharpening machine including asharpening roll mounted to have both a rota-ry and a longitudinal movement,means for retaining a,-A blade'in engagement with the sharpening roll, a drive shaft having an operative connection with the sha1' ening roll, a member provided with a cam groove, a shifting lever pivoted between its ends ...and provided at one end with means for engaging the Vcam groove, and a bar engaging the opposite end ofthe lever andhavlng 'an operative connection with the roll so as to move the roll longitudinally as it is rotated.

7 lA blade sharpening machine including a plurality ot sharpening rolls mounted to have both a rotary and a longitudinal movement, means for retaining a blade adapted to alternately apply said blade to two adjacent rolls, means for shifting tbe-rolls longitudinally back and forth, and means for applying the blade to one roll during movement thereotl in one direction and to theother roll during movement thereof in the opposite direction and changing the' application oi the blade from one roll to the other in synchronisi'n With the change of direction of longitudinal movement of the rolls.

8. A blade sharpening machine including a plurality of sharpening rolls mounted to have both a rotary and a longitudinal movement, means for retaining `a blade, means for shifting said rolls longitudinally back and forth simultaneously, and means for applying said blade alternately to said rolls the change of application of the blade from one roll to the other being synchronized" with the change in direction of longitudinal movement of the rolls,

9. A blade sharpening machine including a pair of sharpening rolls mounted to have both a rotary and a longitudinal movement, a rocking blade carrier, a blade holder upon the blade carrier, the blade being brought alternately into engagement with the tvvo rolls as the carrier is rocked, means for driving the rolls, a pair of disks provided -with cam grooves, means for driving the dis rs, a shifting lever pivoted between its ends and engaging the groove of one of the disks, an operative connection between the said lever and the rolls for moving the rolls longitudinally, a second lever provided lvith means for engaging the groove of the `oosite disk, and an operative connectior` b y'een thesecond lever and the blade ca rier for rocking the same.

'1th in a blade sharpening machine` i sharpening roll, a blade holder provi d Withtrunnions and having a rearwardly 'lacing stop, a support having rearwardly open bearings adapted to receive said trun nions, and a leaf spring carried by said support between said bearings and adapted to engage said blade holder to press the blade into yielding engagement with the roll and adapei at one end to eiigage lsaid stop.

ANDREW L. lli-i'lllllllil).

lvitnesses i E.' BLoDGnrr. 

